The removed lines are a table that shouldn't be necessary, the reason I took them out is because on some styles (including ours), tables like these will result in a visible cadre around the paypal button, and a simple <CENTER> with a couple of <BR> tags do the same job without affecting style.
And I'm afraid the edited version nicely sends me off to paypal with the selected amount when I click it *and* doesn't break my other form using plugins (notably
MGC Chatbox Evo which sits in my center column, which order wise is behind the left column). So I'm very much in the dark as to why this wouldn't work for you.